Do you need to install bloatware? What are the differences between the three different modes?
Erm, in all honesty I had no idea what you meant until I looked down and saw the button in the top left

I don't ever use the binds, but I expect it means you can cycle through them. I.e. there are 6 buttons, but you're able to assign them different actions in each mode. Just a guess, not really sure.
Might have a play in a bit and find out!
:edit: No bloatware as such, just microsoft driver/software stuff to enable the binds and media functions.